This project was supported by Grant # 2009CKWX0594, awarded by the U.S. Department of Justice, Office of Community Oriented Policing Services. The opinions contained herein are those of the authors and do not represent the official position or policies of the U.S. Department of Justice. References to specific companies, products or services should not be considered an endorsement by the authors or the U.S. Department of Justice. Rather, the references are illustrations to supplement discussion of the issues.